AXACARDIACEjE. (CASHEW FAMILY.) 69 



* Flowers polygamous, in a close terminal panicle : drupe red, hairy : leaves pinnate. 



(Xot poisonous.) 



1. R. typhina, L. Branches, petioles, and drupes villous ; leaflets 17 -21, 

 lanceolate, acuminate, serrate, smooth, pale beneath. —Dry hill-sides, Mississippi 

 to North Carolina, and northward. June and July. — A shrub or small tree. 



2 R. glabra, L. Smooth and glaucous; leaflets 17-31, oblong-lanceo- 

 late, serrate, acuminate, white beneath. — Open woods in dry rich soil, West 

 Florida to Mississippi, and northward. July. — A shrub 6° - 10° high. Peti- 

 oles terete. 



3. R. copallina, L. (Sumach ) Branches and wing-margined petioles 

 tomentose ; leaflets 9-21, lanceolate or ovate-lanceolate, acute or obtuse, mostly 

 entire, smooth above, paler and downy beneath ; panicle often large and spread- 

 ing. — Margins of fields and open woods, Florida to Mississippi, and northward. 

 July and August. — A shrub or small tree. 



4. R. pumila, Michx. Low, procumbent ; branches and petioles tomen- 

 tose ; leaflets 11-13, oval or oblong, acute, coarsely serrate, pale and tomentose 

 beneath. — Pine barrens, Georgia to North Carolina. — Branches 1° high. 



* * Flowers dioecious, in loose axillary panicles : drupe whitish, smooth : leaves pin- 



nate and trifoliolate. — {Juice poisonous.) 



5. R. venenata, DC. (Poison Elder.) Smooth; leaves pinnate ; leaf- 

 lets 7 - 13, ovate or oblong, abruptly acute or acuminate, entire ; panicles long- 

 pcduncled, narrow, erect. (I\. Vernix, L.) — Swamps, Florida to Mississippi, 

 and northward. July. — A shrub 8°- 12° high. 



6« R. Toxicodendron, L. (Poisox Oak. Poisox Ivy.) Branches 

 and petioles smooth ; leaves trifoliolate ; leaflets ovate or oblong-ovate ; panicle 

 small, spreading. 



Var. 1 . quercifolium, Michx. Stems low, erect ; leaflets mostly vari- 

 ously lobed. — Dry pine barrens. 



Var. 2. radicans, Torr. Stems climbing by rootlets ; leaflets toothed or 

 entire, rarely lobed, more or less pubescent. — Swamps, Florida to Mississippi, 

 and northward. July. 



* * * Flowers diozcious, in loose panicles : drupe oblong, smooth, scarlet : nut char- 



taceous : seeds arillate : leaves pinnate. 



7. R. Metopium, L. Smooth; leaflets 3-7, coriaceous, long-stalked, 

 ovate or elliptical, acuminate, entire ; panicle narrow, as long as the leaves ; 

 calyx-lobes yellowish-white ; petals and stamens 5. — South Florida. — A tree 

 ir>°-20° high. 



* # # * Flowers diozcious, in short bracted spikes, appearing with the leaves : drupe 



red, hairy : leaves trifoliolate. 



8. R. aromatica, Ait. Stem low, smooth ; leaflets ovate, or the termi- 

 nal one obovate, obtuse, pubescent when young, toothed above the middle ; 

 spikes single or clustered, spreading. — Dry open woods, "We^t Florida to Mis- 

 sissippi, and northward. March and April. — Shrub l°-2° high. Spikes 1' 

 long. — Plant aromatic, not poisonous. 



